Research of influence of random change of annular seal parameters on efficiency of centrifugal pump

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.85410

Keywords:

centrifugal pump, annular seal, flow-rate, volume efficiency, random parameters

Abstract

Development of reliable methods of increasing of centrifugal pump efficiency is a very actual scientific and practical problem. One of ways to increase reliability and efficiency of centrifugal pump is an improvement of constructions of annular seals of running part and methods of their calculation. Now in engineering practice several approaches to research of complicated spiral flow of liquid in the small gaps of annular seals are used. Divergences in the conclusions of researchers are likely to be linked with assumptions that are accepted when solving nonlinear equations of non-stationary motion of liquid in the gap of annular seal. It is necessary to mark that divergences between the calculation values of hydrodynamic characteristics of annular seals and rotor-dynamic characteristics of pump that arise during exploitation are first of all possible to explain by the absence of account of possible change of geometrical parameters of the annular seals, caused by the accepted tolerances in the calculations. Using of probabilistic methods of calculation with existent statistical information got on the stages of design and operating of centrifugal pumps will allow to forecast reliability and efficiency of centrifugal pumps taking into account influence and changing of basic operating factors.

Determination of influence of random change of annular seal parameters on flow-rate characteristics and volume efficiency of centrifugal pump is the goal of this research. Dependences to determinate the flow-rate of liquid through the annular seal are got by solving the problem of liquid flow in a cylindrical channel with taking into account the influence of random factors. Influence of random variations of basic geometrical and regime parameters of annular seal on efficiency pump is considered. It is shown on the example of cantilever pump with one impeller, that its efficiency can substantially (up to 1 %) decrease under exploitation. This decrease can be higher in case when pump has more stages.

Author Biographies

Yuliia Tarasevych, Sumy State University Rymskogo-Korsakova str., 2, Sumy, Ukraine, 40007

PhD, Associate Professor

Department of general mechanics and dynamics of machines

Ievgen Savchenko, Sumy State University Rymskogo-Korsakova str., 2, Sumy, Ukraine, 40007

PhD, Associate Professor

Department of general mechanics and dynamics of machines

Nataliia Sovenko, Sumy State University Rymskogo-Korsakova str., 2, Sumy, Ukraine, 40007

PhD, Associate Professor

Department of general mechanics and dynamics of machines

Anna Savchenko, Sumy State University Rymskogo-Korsakova str., 2, Sumy, Ukraine, 40007

Department of general mechanics and dynamics of machines

References

  1. Martsinkovskii, V. A. (1980). Beskontaktnyie uplotnienia rotornykh mashin. Мoscow: Mashinistroienie, 200.
  2. Martsinkovskii, V. A. (2005). Shchelewyie uplotnenia: teoria i praktika. Sumy: Izdatelstvo Sumskogo gosuniversiteta, 416.
  3. Childs, D. W., Kim, C.-H. (1985). Analysis and Testing for Rotordynamic Coefficients of Turbulent Annular Seals With Different, Directionally-Homogeneous Surface-Roughness Treatment for Rotor and Stator Elements. Journal of Tribology, 107 (3), 296. doi: 10.1115/1.3261054
  4. Childs, D., Garcia, F. (1987). Test Results for Sawtooth-Pattern Damper Seals: Leakage and Rotordynamic Coefficients. Journal of Tribology, 109 (1), 124. doi: 10.1115/1.3261303
  5. Villasmil, L. A., Chen, H.-C., Childs, D. W. (2005). Evaluation of Near-Wall Turbulence Models for Deliberately Roughened Liquid Annular Seals. AIAA Journal, 43 (10), 2137–2146. doi: 10.2514/1.6931
  6. Morrison, G. L., Johnson, M. C., Thames III, H. D. (2002). Comparison of the Flow Inside Whirling and Non-Whirling Smooth Annular Seals at 50 % Eccentricity. International Journal of Rotating Machinery, 8 (2), 141–152. doi: 10.1155/s1023621x02000131
  7. Lee, Y. B., Shin, S. K., Ryu, K., Kim, C. H., Jang, G. (2005). Test Results for Leakage and Rotordynamic Coefficients of Floating Ring Seals in a High-Pressure, High-Speed Turbopump. Tribology Transactions, 48 (3), 273–282. doi: 10.1080/05698190590948250
  8. Athavale, M. M., Hendricks, R. C., Steinetz, B. M. (1996). Numerical Simulation of Flow in a Whirling Annular Seal And Comparison With Experiments. Proc. of the 6th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, 1, 552–562.
  9. Choe, B. S., Ha, T.-W. (2010). Prediction of leakage and rotordynamic coefficients for annular-type-plain-pump seal using CFD analysis. IFToMM-Conference on Rotor dynamics, 470–474.
  10. Kundera, C. A., Korczak, A., Zahorulko, A., Gerasimiva, K., Plykin, M. (2008). CFD simulation of short and long annular seals. Zeszyty Naukowe Politechniki Swietokrzyskiej. Nauki Techniczne, 77–89.
  11. Yang, R., Yang, J., Qi, M., Shi, L., Peng, Z. (2010). Numerical investigation of leakage and power loss for different seal types in turbine stage environment. ASME Proceedings. Heat Transfer, 1081–1090. doi: 10.1115/gt2010-22743
  12. Pugachev, A. O. (2009). CFD Optimization of Liquid Annular Seals for Leakage and Rotordynamics Improvement. ASME Proceedings. Structures and Dynamics, 657–667. doi: 10.1115/gt2009-59173
  13. Ratner, A. V., Zelenskii, V. G. (1966). Erosia materialov teploenergeticheskogo oborudovania. Мoscow: Energia, 272.

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Published

2016-12-22

How to Cite

Tarasevych, Y., Savchenko, I., Sovenko, N., & Savchenko, A. (2016). Research of influence of random change of annular seal parameters on efficiency of centrifugal pump. Eastern-European Journal of Enterprise Technologies, 6(7 (84), 37–42. https://doi.org/10.15587/1729-4061.2016.85410

Issue

Vol. 6 No. 7 (84) (2016): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2016 Yuliia Tarasevych, Ievgen Savchenko, Nataliia Sovenko, Anna Savchenko

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